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Full-Text Articles in Life Sciences
Attention Shapes Our Expectations And Perceptions: The Neural Mechanisms Of Top-Down Attention During Adulthood And Development, Snigdha Banerjee
Attention Shapes Our Expectations And Perceptions: The Neural Mechanisms Of Top-Down Attention During Adulthood And Development, Snigdha Banerjee
Dissertations, Theses, and Capstone Projects
Top-down attention is the focusing of attention at one's will through knowledge regarding a current task. There is evidence that top-down attention involves the modulation of sensory cortices by higher order regions. However, the mechanisms of top-down attention across sensory modalities, its influence on early sensory inputs, as well as interactions with motivational systems remain unclear. We performed the following set of electrophysiological experiments in typically developed adults and adolescents to examine these areas. 1) The supramodal attentional theory holds that parietally-based attentional mechanisms are shared across sensory modalities. We tested the supramodal theory by examining if lateralized parieto-occipital alpha-band …
Executive Dysfunction And Reward Dysregulation: Interactions In Drug Addiction, Kristen Paula Morie
Executive Dysfunction And Reward Dysregulation: Interactions In Drug Addiction, Kristen Paula Morie
Dissertations, Theses, and Capstone Projects
Cocaine addiction is a serious public health hazard, and contributes to disastrous outcomes for individuals who suffer from it. Addiction is accompanied by an inability to control one's own behavior, and a preoccupation with cocaine at the expense of other rewarding pursuits. Previous research has suggested that difficulties with executive function and reward processing may underlie these problems, but the extent to which each contributes to addiction severity, or how these two factors may interact, remains to be elucidated. By using event related potential (ERP) measures in combination with information about self-reported anhedonia over three experiments, we set out to …